Hãy chọn MỘT từ thích hợp để điền vào đoạn văn sau.
There are two long (1) _____ in Vietnam. The Red River is 1,200 kilometers long. It (2) _____ in China and flows to the Gulf (3) _____ Tonkin.
The (4) _____ river is longer than the Red River. It starts in Tibet and flows to the Bien Dong.
The Amazon River is the (5) _____ river in the world. It is 6,750 kilometers long. It starts in Peru and flows to the Atlantic Ocean.
Everest is the tallest (6) _____ in the world. It is 8,863 meters (7) _____ Vietnam has (8) _____ mountains. The Truong Son is the (9) _____ range of mountains. (10) _____ Vietnam mountains are smaller than Everest.